EP0105987A2 - Verfahren zum Messen der Position eines Gattersägeblattes - Google Patents

Verfahren zum Messen der Position eines Gattersägeblattes Download PDF

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Publication number
EP0105987A2
EP0105987A2 EP82305440A EP82305440A EP0105987A2 EP 0105987 A2 EP0105987 A2 EP 0105987A2 EP 82305440 A EP82305440 A EP 82305440A EP 82305440 A EP82305440 A EP 82305440A EP 0105987 A2 EP0105987 A2 EP 0105987A2
Authority
EP
European Patent Office
Prior art keywords
blade
measuring
light
transmitters
attached
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP82305440A
Other languages
English (en)
French (fr)
Other versions
EP0105987A3 (de
Inventor
Jaakko M. A. Hakkarainen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCANOPTICS Oy
Original Assignee
SCANOPTICS Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SCANOPTICS Oy filed Critical SCANOPTICS Oy
Priority to EP82305440A priority Critical patent/EP0105987A3/de
Publication of EP0105987A2 publication Critical patent/EP0105987A2/de
Publication of EP0105987A3 publication Critical patent/EP0105987A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/001—Measuring or control devices, e.g. for automatic control of work feed pressure on band saw blade
    • B23D59/002—Measuring or control devices, e.g. for automatic control of work feed pressure on band saw blade for the position of the saw blade
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B3/00—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks
    • B27B3/28—Components
    • B27B3/36—Devices for adjusting the mutual distance of the saw blades

Definitions

  • the present invention relates to a method for measuring the position of a saw blade, in particular a frame-saw blade, by using light for the measuring.
  • CH Patent 275 525 On the basis of, for example, CH Patent 275 525, it is known to use for determining the position of saw blades a spirit level and a graduated scale connected with it, by means of which the inclination of the blades, as seen from the side, can be set at the desired value.
  • the use of accurate- measuring intermediate pieces which speed up re-positioning is known on the basis of, for example, FI Patent 51 440.
  • the object of the invention is now to apply the use of light beams also to the measuring of the position of saw blades, in which case the blades can be oriented with great speed and certainty.
  • the orientation is more accurate than before, and so re-orienting is not necessary and thereby extra stoppages are avoided.
  • the orienting is done by using light.
  • the light is specifically laser, with sufficient intensity for producing the required clear measuring line or point.
  • the apparatus can operate using even conventional sources of light, even though their use generally requires rather short measuring intervals.
  • the frame-saw blade to be oriented is indicated by numeral 5.
  • Light transmitters _1 which are preferably laser transmitters, are attached to the blade by means of suitable holders or, for example, magnets.
  • the lines of light transmitted by them are illustrated in the figure by means of lines departing from the transmitters and arriving at the measuring plane 2.
  • the scales have been precalibratedin such a way that if the line of light transmitted by a transmitter deviates from the values it should have, it is automatically known that adjustment is necessary.
  • the scale 3 indicates the relative positions of the upper end and the lower end of the blade 5 in relation to each other, i.e. whether the upper end, respectively lower end, is further ahead in the cutting direction than the other end.
  • the horizontal line of the transmitter installed horizontally on the blade either rises or respectively lowers, if the upper end of the blade 5 is inclined in the travel direction, respectively the direction opposite to the travel direction.
  • the scale 4 for its part is intended to illustrate the inclination of the blade in the direction perpendicular to the former direction.
  • it can be used for checking whether, for example, the lower end of the blade has moved laterally from the cutting plane on which it should be. If moving has occurred, the boards to be sawn will not be of an even thickness, but one edge will be thicker than the other. In this case there is a difference between the readings on the scales on the measuring plane, the scales being in a horizontal position at the upper and lower edges of the plane. If, on the other hand, the readings deviate.in the same direction and by an equal amount on both the upper.
  • Figure 2 depicts an apparatus for carrying out an alternative method.
  • the transmitters are not attached to the blade 5, but mirrors 7 are attached to the blades, the mirrors being equipped with sufficiently long guides in order that the position be absolutely the same each time.
  • the transmitters 1, on the other hand, are placed behind the measuring plane 2, from where they transmit their beams through slits 6 to the mirrors 7 and from their surfaces back onto the measuring plane.
  • Reference numeral 1 indicates the inclination known from the previous embodiment. Thus there is inclination in the travel direction, respectively the direction opposite to the travel direction of the timber, if there is a vertical difference between the departing beam, i.e. slit 6, and the arriving beam, the difference being indicated by numeral 3'in the figure.
  • the deviation from the center line which is indicated by numeral 4', represents in this embodiment the same as the scale 4 in the previous embodiment, and the inclination can also be seen in the respective manner on the measuring plane 2.
  • the transmitters 1 are movable in the lateral direction, from which it follows that a suitable slit 4'can be selected in advance, and thus the increase, respectively decrease, of the difference 4 J can be observed in order to detect errors of orientation. Since the vertical difference 3 depends on the vertical position of the mirrors 7 on the blade, the difference 3'can also be adjusted to a suitable value by moving the mirrors in order to avoid a situation in which the arriving point would be at the slit 6. Thus the uncertainty factor which would otherwise exist if the point disappeared in the clearance 6 is eliminated.
  • the location of the measuring plane 2 is not very critical, for its distance from the blade can be, for example, between 5 and 30 m. Very great accuracy is not achieved using a plane at a distance shorter than five meters, and the use of a plane at a distance greater than 30 m sets high demands on the optics used. Thus, within the distance range mentioned above the apparatus is both sufficiently simple by structure and accurate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
EP82305440A 1982-10-13 1982-10-13 Verfahren zum Messen der Position eines Gattersägeblattes Withdrawn EP0105987A3 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP82305440A EP0105987A3 (de) 1982-10-13 1982-10-13 Verfahren zum Messen der Position eines Gattersägeblattes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82305440A EP0105987A3 (de) 1982-10-13 1982-10-13 Verfahren zum Messen der Position eines Gattersägeblattes

Publications (2)

Publication Number Publication Date
EP0105987A2 true EP0105987A2 (de) 1984-04-25
EP0105987A3 EP0105987A3 (de) 1985-05-15

Family

ID=8189807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82305440A Withdrawn EP0105987A3 (de) 1982-10-13 1982-10-13 Verfahren zum Messen der Position eines Gattersägeblattes

Country Status (1)

Country Link
EP (1) EP0105987A3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994022624A1 (en) * 1993-03-30 1994-10-13 Wiklund Ernst S G F Optical device and method for obtaining reference planes, especially for hand-held tools

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE843172C (de) * 1949-11-18 1952-07-07 Josef Blaha Einrichtung zum schnittrechten Einstellen von Gatter-, Kreis-, Bandsaegen u. dgl.
DE2236693A1 (de) * 1971-07-27 1973-02-08 Macpherson Verfahren und vorrichtung zur ueberpruefung der einstellung der vorderraeder eines kraftfahrzeugs
DE1673848B2 (de) * 1968-02-02 1975-10-16 Daimler-Benz Ag, 7000 Stuttgart Einrichtung zur Kontrolle des Nachlaufs und/oder des Sturzes an gelenkten Kraftwagenachsen
DE2622355A1 (de) * 1976-05-19 1977-12-01 Dieter Dipl Ing Maier Einstellgeraet fuer mehrspindelkoepfe und mehrspindelmaschinen mit einstellbarem bearbeitungsbild
US4188544A (en) * 1977-08-22 1980-02-12 Weyerhaeuser Company Method and apparatus for automatically processing a workpiece employing calibrated scanning

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE843172C (de) * 1949-11-18 1952-07-07 Josef Blaha Einrichtung zum schnittrechten Einstellen von Gatter-, Kreis-, Bandsaegen u. dgl.
DE1673848B2 (de) * 1968-02-02 1975-10-16 Daimler-Benz Ag, 7000 Stuttgart Einrichtung zur Kontrolle des Nachlaufs und/oder des Sturzes an gelenkten Kraftwagenachsen
DE2236693A1 (de) * 1971-07-27 1973-02-08 Macpherson Verfahren und vorrichtung zur ueberpruefung der einstellung der vorderraeder eines kraftfahrzeugs
DE2622355A1 (de) * 1976-05-19 1977-12-01 Dieter Dipl Ing Maier Einstellgeraet fuer mehrspindelkoepfe und mehrspindelmaschinen mit einstellbarem bearbeitungsbild
US4188544A (en) * 1977-08-22 1980-02-12 Weyerhaeuser Company Method and apparatus for automatically processing a workpiece employing calibrated scanning

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994022624A1 (en) * 1993-03-30 1994-10-13 Wiklund Ernst S G F Optical device and method for obtaining reference planes, especially for hand-held tools

Also Published As

Publication number Publication date
EP0105987A3 (de) 1985-05-15

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE DE FR

PUAL Search report despatched

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Effective date: 19851106

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Effective date: 19860930

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SCANOPTICS OY

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18D Application deemed to be withdrawn

Effective date: 19870210

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HAKKARAINEN, JAAKKO M. A.